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Unoccupied Electronic States
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Book Synopsis Unoccupied Electronic States by : Peter Andrews
Download or read book Unoccupied Electronic States written by Peter Andrews and published by Springer. This book was released on 1992-01-01 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past two decades our understanding of the occupied electronic states of solides has undergone a revolution, while our knowledge of the unoccupied states has lagged behind. This is now changing, owing to the progress in techniques such as X-ray absorption and inverse photoemission, and a complete picture is beginning to emerge. This book presents the theoretical and experimental basis of the subject of unoccupied electronic states. It begins by describing the modern theoretical picture of unoccupied states, starting with the single-particle picture and going on to various aspects of many-body interaction and correlation. The theory of modern spectroscopic methods (XANES, EELS,IPS and BIS) used to study unoccupied states is discussed and examples are given to illustrate these techniques. This volume stresses the unity of the concepts required to understand both occupied and unoccupied states and demonstrates the importance of unoccupied states for our comprehension of the optical, thermal and transport properties of materials.
Book Synopsis Unoccupied Electronic States by : J. C. Fuggle
Download or read book Unoccupied Electronic States written by J. C. Fuggle and published by Springer Verlag. This book was released on 1992 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Probing Unoccupied Electronic States in Aqueous Solutions by : Lars-Åke Näslund
Download or read book Probing Unoccupied Electronic States in Aqueous Solutions written by Lars-Åke Näslund and published by . This book was released on 2004 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unoccupied electronic states probed by ultraviolet bremsstrahlung spectroscopy by : Thomas Fauster
Download or read book Unoccupied electronic states probed by ultraviolet bremsstrahlung spectroscopy written by Thomas Fauster and published by . This book was released on 1984 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unoccupied Electronic Structure in the Surface State of Lightly-doped SrTiO 3 by Resonant-inverse Photoemission Spectroscopy by : T. Higuchi
Download or read book Unoccupied Electronic Structure in the Surface State of Lightly-doped SrTiO 3 by Resonant-inverse Photoemission Spectroscopy written by T. Higuchi and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spin-Orbit-Induced Spin Textures of Unoccupied Surface States on Tl/Si(111) by : Sebastian David Stolwijk
Download or read book Spin-Orbit-Induced Spin Textures of Unoccupied Surface States on Tl/Si(111) written by Sebastian David Stolwijk and published by Springer. This book was released on 2015-06-13 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the construction of a rotatable spin-polarized electron source and its use in spin- and angle-resolved inverse photoemission to investigate the unoccupied electron states of Tl/Si(111)-(1x1) with special emphasis on their spin texture. Towards more efficient electronics - with the electron spin as information carrier: This motto is the motivation for numerous studies in solid state physics that deal with electron states whose spin degeneracy is lifted by spin-orbit interaction. This thesis addresses the spin-orbit-induced spin textures in momentum space in the surface electronic structure of a prototypical Rashba-type hybrid system: heavy metal thallium on semiconducting silicon. For Tl/Si(111)-(1x1), the thallium adlayer provides surface states with strong spin-orbit interaction and peculiar spin-orbit-induced spin textures: spin rotations and spin chirality in momentum space for unoccupied surface states with giant spin splittings. Almost completely out-of-plane spin-polarized valleys in the vicinity of the Fermi level are identified. As the valley polarization is oppositely oriented at specific points in momentum space, backscattering should be strongly suppressed in this system.
Book Synopsis Modern Techniques of Surface Science by : D. P. Woodruff
Download or read book Modern Techniques of Surface Science written by D. P. Woodruff and published by Cambridge University Press. This book was released on 1994-03-03 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revised and expanded second edition of the standard work on new techniques for studying solid surfaces.
Book Synopsis Controlling Collective Electronic States in Cuprates and Nickelates by : Martin Bluschke
Download or read book Controlling Collective Electronic States in Cuprates and Nickelates written by Martin Bluschke and published by Springer Nature. This book was released on 2020-07-27 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis chemical and epitaxial degrees of freedom are used to manipulate charge and spin ordering phenomena in two families of transition metal oxides, while taking advantage of state-of-the-art resonant x-ray scattering (RXS) methods to characterize their microscopic origin in a comprehensive manner. First, the relationship of charge density wave order to both magnetism and the "pseudogap" phenomenon is systematically examined as a function of charge-carrier doping and isovalent chemical substitution in single crystals of a copper oxide high-temperature superconductor. Then, in copper oxide thin films, an unusual three-dimensionally long-range-ordered charge density wave state is discovered, which persists to much higher temperatures than charge-ordered states in other high-temperature superconductors. By combining crystallographic and spectroscopic measurements, the origin of this phenomenon is traced to the epitaxial relationship with the underlying substrate. This discovery opens new perspectives for the investigation of charge order and its influence on the electronic properties of the cuprates. In a separate set of RXS experiments on superlattices with alternating nickel and dysprosium oxides, several temperature- and magnetic-field-induced magnetic phase transitions are discovered. These observations are explained in a model based on transfer of magnetic order and magneto-crystalline anisotropy between the Ni and Dy subsystems, thus establishing a novel model system for the interplay between transition-metal and rare-earth magnetism.
Book Synopsis Magnetism and Accelerator-Based Light Sources by : Hervé Bulou
Download or read book Magnetism and Accelerator-Based Light Sources written by Hervé Bulou and published by Springer Nature. This book was released on 2021-02-17 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book collects the contributions of the seventh school on Magnetism and Synchrotron Radiation held in Mittelwihr, France, from 7 to 12 October 2018. It starts with an introduction to the physics of modern X-ray sources followed by a general overview of magnetism. Next, light / matter interaction in the X-ray range is covered with emphasis on different types of angular dependence of X-ray absorption spectroscopy and scattering. In the end, two domains where synchrotron radiation-based techniques led to new insights in condensed matter physics, namely spintronics and superconductivity, are discussed. The book is intended for advanced students and researchers to get acquaintance with the basic knowledge of X-ray light sources and to step into synchrotron-based techniques for magnetic studies in condensed matter physics or chemistry.
Book Synopsis Unoccupied Electronic States and Surface Phenomena for YBa2Cu3O6.9 by :
Download or read book Unoccupied Electronic States and Surface Phenomena for YBa2Cu3O6.9 written by and published by . This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploring Electron-Electron Interactions in Solid-State Physics by : Claribel Celia
Download or read book Exploring Electron-Electron Interactions in Solid-State Physics written by Claribel Celia and published by . This book was released on 2023-11-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction In this thesis, we delve into the application of quantum mechanics to electrons in solids, a concept initially introduced by Sommerfeld [1]. At the outset, this approach assumed that all valence electrons were free, effectively disregarding both electron-electron and electron-lattice interactions within the model. These two interactions serve as the central focus of our investigation. Free-Electron Theory The free-electron theory effectively accounted for the small heat capacity and magnetic susceptibility of metals. At finite temperatures, the number of electrons contributing to thermal or transport properties is proportional to kBT divided by EF, where EF represents the Fermi energy. Consequently, properties such as specific heat scale with an order of magnitude of kBT divided by EF. Formation of Energy Bands Within a solid, numerous atomic orbitals overlap with each other, resulting in a complex interplay of electronic states. If we commence with N atomic levels, this leads to N^2 molecular orbitals. Half of these molecular orbitals possess lower energies compared to the atomic energies, while the other half exhibit higher energies. The energy gap between these "molecular levels" diminishes as atoms approach one another, eventually forming a quasi-continuous spectrum of energy levels known as an energy band. This assumption, although reasonable, should be considered alongside the presence of closely spaced energy levels. Metals and Insulators The formation of energy bands is depicted schematically in Figure 1.1. In band theory, a clear distinction arises between metals and insulators. A material hosting one or more partially filled bands is categorized as a metal. At absolute zero temperature, electrons occupy energy states up to a maximum energy level known as the Fermi energy (EF), leaving higher energy states unoccupied. When an electric field is applied, electrons can freely migrate to these empty higher energy states, enabling electrical conduction. Prominent examples of such materials include alkali metals found in the periodic table, such as Li, Na, K, Rb, and Cs. Conversely, insulators (or semiconductors) present a different scenario, with lower-energy bands being fully occupied, while higher-energy bands remain unoccupied. An energy gap (Eg) exists between these occupied and unoccupied bands. Consequently, the density of states (N(E)) at the Fermi energy (EF) is zero for insulators. Figure 1.2 illustrates the density of states for a typical metal. Conclusion This thesis explores the intricacies of these interactions and energy bands, shedding light on the fundamental distinctions between metals and insulators, and their implications for the behavior of electrons in solids.
Book Synopsis XANES Studies of Unoccupied Electronic States and Local Real Structure of Some Antimony Calchogenides by : E. Burattini
Download or read book XANES Studies of Unoccupied Electronic States and Local Real Structure of Some Antimony Calchogenides written by E. Burattini and published by . This book was released on 1984 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CRC Handbook of Thermal Engineering by : Raj P. Chhabra
Download or read book CRC Handbook of Thermal Engineering written by Raj P. Chhabra and published by CRC Press. This book was released on 2017-11-08 with total page 1801 pages. Available in PDF, EPUB and Kindle. Book excerpt: The CRC Handbook of Thermal Engineering, Second Edition, is a fully updated version of this respected reference work, with chapters written by leading experts. Its first part covers basic concepts, equations and principles of thermodynamics, heat transfer, and fluid dynamics. Following that is detailed coverage of major application areas, such as bioengineering, energy-efficient building systems, traditional and renewable energy sources, food processing, and aerospace heat transfer topics. The latest numerical and computational tools, microscale and nanoscale engineering, and new complex-structured materials are also presented. Designed for easy reference, this new edition is a must-have volume for engineers and researchers around the globe.
Book Synopsis Unoccupied Electronic Structure of Ni2MnGa Ferromagnetic Shape Memory Alloy by :
Download or read book Unoccupied Electronic Structure of Ni2MnGa Ferromagnetic Shape Memory Alloy written by and published by . This book was released on 2015 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Momentum resolved inverse photoemission spectroscopy measurements show that the dispersion of the unoccupied bands of Ni2MnGa is significant in the austenite phase. Furthermore, in the martensite phase, it is markedly reduced, which is possibly related to the structural transition to an incommensurate modulated state in the martensite phase. Finally, based on the first principle calculations of the electronic structure of Ni-Mn-Ga, we show that the modification of the spectral shape with surface composition is related to change in the hybridization between the Mn 3d and Ni 3d-like states that dominate the unoccupied conduction band.
Book Synopsis Solid State Physics by : Philip Hofmann
Download or read book Solid State Physics written by Philip Hofmann and published by John Wiley & Sons. This book was released on 2015-04-30 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: A must-have textbook for any undergraduate studying solid state physics. This successful brief course in solid state physics is now in its second edition. The clear and concise introduction not only describes all the basic phenomena and concepts, but also such advanced issues as magnetism and superconductivity. Each section starts with a gentle introduction, covering basic principles, progressing to a more advanced level in order to present a comprehensive overview of the subject. The book is providing qualitative discussions that help undergraduates understand concepts even if they can?t follow all the mathematical detail. The revised edition has been carefully updated to present an up-to-date account of the essential topics and recent developments in this exciting field of physics. The coverage now includes ground-breaking materials with high relevance for applications in communication and energy, like graphene and topological insulators, as well as transparent conductors. The text assumes only basic mathematical knowledge on the part of the reader and includes more than 100 discussion questions and some 70 problems, with solutions free to lecturers from the Wiley-VCH website. The author's webpage provides Online Notes on x-ray scattering, elastic constants, the quantum Hall effect, tight binding model, atomic magnetism, and topological insulators. This new edition includes the following updates and new features: * Expanded coverage of mechanical properties of solids, including an improved discussion of the yield stress * Crystal structure, mechanical properties, and band structure of graphene * The coverage of electronic properties of metals is expanded by a section on the quantum hall effect including exercises. New topics include the tight-binding model and an expanded discussion on Bloch waves. * With respect to semiconductors, the discussion of solar cells has been extended and improved. * Revised coverage of magnetism, with additional material on atomic magnetism * More extensive treatment of finite solids and nanostructures, now including topological insulators * Recommendations for further reading have been updated and increased. * New exercises on Hall mobility, light penetrating metals, band structure
Book Synopsis Characterization I by : Hellmut G. Karge
Download or read book Characterization I written by Hellmut G. Karge and published by Springer Science & Business Media. This book was released on 2004-02-09 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Sieves - Science and Technology covers, in a comprehensive manner, the science and technology of zeolites and all related microporous and mesoporous materials. Authored by renowned experts, the contributions are grouped together topically in such a way that each volume of the book series deals with a specific sub-field. Volume 4 covers the characterization of molecular sieves with the help of the most important spectroscopic techniques (Characterization I), i.e. IR, Raman, NMR, EPR, UV-VIS Spectroscopy, X-ray absorption, photoelectron and Mössbauer Spectroscopy. Theory, experiment and application in selected examples are discussed.
Book Synopsis Concise Concepts of Nanoscience and Nanomaterials by : N. Kumar
Download or read book Concise Concepts of Nanoscience and Nanomaterials written by N. Kumar and published by Scientific Publishers. This book was released on 2018-08-01 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a basic understanding of the emerging multidisciplinary area of nanoscience and nanomaterials being offered as core subjects both in basic sciences and engineering disciplines at graduate and postgraduate levels. The subject matter of the book is designed to generate a clear understanding on various aspects of nanoscience from fundamentals to technological applications along with the exhaustive account of nanomaterials classified in a very appropriate manner. Book includes a balanced view on the physics to understand the origin of unique properties of nanomaterials and well tested synthetic techniques including simple chemical and physical routes illustrated with examples. Special emphasis is given on the characterization techniques for nanomaterials in terms of spectroscopy, scattering phenomena and microscopy including their principle, methodology and data interpretation illustrated with examples. I order to drive on the significance of nanoscience and nanomaterials; impact of nanotechnology in diverse area such as health care, environment protection, agriculture, energy, security has been dealt separately. The historical perspective as well existence of nanomaterials in nature both in living and nonliving species has also been discussed in the beginning. It is hoped that the book will prove to be student centric at all levels, from different disciplines to understand the revolutionary as well as evolutionary field of nanoscience. Further, book will also be a valuable resource for professionals, researchers and others interested to gain understanding of the principles of nanoscience and benefits of nanomaterials in developing newer technology.
